My brother's bro date.

I think you should let him bring whoever he wants. If he feels more comfortable with one of his guys friends, rather than bringing a girl he barely knows then let him do that. Who knows, he might surprise you. Maybe having a couple "wing men" there would be fun.

You gave him a plus one. It's his choice how he uses it. End of story.

I don't think you should be concerned. He and a one friend will be comfortable together, but aren't likely to act the way they do around their frat friends when so few of those types are there. While you may feel it's common knowledge to bring someone of the opposite sex to the wedding, you could argue that it's common knowledge that you only bring a very close date (not a casual date) to those types of events. Why would he want someone he isn't serious with to meet your entire family?

It is in everyone's best interest for everyone at the wedding to have fun. Let him enjoy the wedding the way he sees fit, unless he causes issues. Don't create issues for yourself!

At least he's not bringing some random slut/bitch.

Honestly I think you're fiancé is being a bit of a jerk. You gave him a plus one, he can bring whoever he wants.

I hope you're right about him acting better for the wedding Kyle. He is usually nasty to me around his friends. Most of his guy friends are real snobs. He's much sweeter when his female friends are around. Maybe I need to give him a talking to about how he treats me if he's going to bring one of the guys.

You gave him a plus one. You don't get to dictate who his guest is or how he and his guest are to behave.

I think the point of a plus one is to bring someone you enjoy spending time with. Honestly, he's in the wedding party and I am sure he knows plenty of people that will be at your wedding. If he wasn't in a serious relationship; I wouldn't have given him a plus one. As you did give him a plus one, you will need to let go. There's nothing to say that even if he brought a girl with him, he would be any better than by him bringing a male friend. Plus at least if its a friend, maybe it will be a friend you know as opposed to some random stranger he is bringing to your wedding.

You extended a "plus one," not a "plus one that only I can approve of."

When you give someone a plus one, you give your guest the right to bring whomever they want. I'm sure it'll be fine.

I am sure it will be fine. I am sure you will be so into the wedding and everything going on that day that you probably wont even notice.

I know how frat guys can be...I'm marrying one. You just have to take their behavior with a grain of salt. Have a thick skin and don't let it ruin your day.